United States Patent [191 Uno et al.
IlllllllllllllllllllllllllllllllIlllllllllllllllllllllllllllllllll|||||Illl USO05271 197A
Patent Number:
Date of Patent: 5,271,197
Dec. 21, 1993 [11]
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EARTHQUAKE RESISTANT MULTI-STORY BUILDING
Inventors: Toshio Uno; Yoshitaka Yabe; Kiyoshi Ikura; Shinji Mase; Toshihiko Hirama; Hideo Shimizu, all of Tokyo; Masahiro Kato, Kashiwa; Fumio Ohtake, Kashima; Takehiko Terada; Tomomi Kanemitsu, both of Tokyo, all of Japan
Assignees: Shimizu Construction Co., Ltd., Tokyo; Sumitomo Metal Industries, Ltd., Osaka, both of Japan
Appl. No.: 928,080
Filed: Aug. 13, 1992
Related U.S. Application Data
Continuation of Ser. No. 543,l26, Aug. 6, i990, aban doned, which is a continuation-in-part of Ser. No. 376,922, Jul. 10, 1989, abandoned, which is a continua tion of Ser. No. l0l,663, Sep. 28, 1987, abandoned.
Foreign Application Priority Data
References Cited
U.S. PATENT DOCUMENTS
3,638,377 2/1972 Caspe. 4,991,366 2/1991 Teramuro et al..
OTHER PUBLICATIONS
“Earthquake-Resistant Limit State Design for Build ings” by Hiroshi Akiyama (University of Tokyo Press) 1985 Architecture-Sep. 1983 pp. 74-76.
Primary Examiner-Carl D. Friedman Assistant Examiner-Creighton Smith Attorney, Agent, or Firm-Cushman, Darby & Cushman
[57] ABSTRACT The present invention provides an earthquake resistant multi-story building which is characterized by having an energy concentration story. The energy concentra tion story has an elasto-plastic force-displacement rela tionship regarding horizontal force and displacement. The force-displacement relationship is characterized in that: (a) stiffness in elastic range (Fy/dy) is generally equal to an optimal stiffness of the same story according to an elastic design concept; (b) the yield strength Fy is generally less than 80% of an optimum yield strength; (c) stiffness in plastic range is positive and generally less than about a half of the stiffness in the elastic range; and (d) ultimate displacement is generally at least twice as large as the yield displacement. The energy concentra tion story is capable of entering into the plastic range while other stories are in the elastic range, and absorb ing vibration energy by plastic deformations thereof so as to decrease deformations of other stories when a large external force is exerted to the building.
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13 Claims, 19 Drawing Sheets
26, 1986 [JP] Japan .............................. ._ 61-227781 30, 1986 [JP] Japan .............................. .. 61-231689
23,1989 [JP] Japan ............................ .. l-l61873
23,1989 [JP] Japan ................................ .. l-161874
Int. Cl.5 .................................. .. E04H 9/02
U.S. Cl. ..................................... .. 52/167 R
Field of Search .................... .. 52/ 167 R, 294, 729
US. Patent Dec. 21, 1993 7Sheet 0t; 19 5,271,197
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US. Patent Dec. 21, 1993 Sheet 7 of 19 5,271,197
FIGHA *FIGJIB
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FIGHC FIGHD
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US. Patent Dec. 21, 1993 Sheet 9 of 19 5,271,197
in 3'
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US. Patent Dec. 21,v 1993 Sheet 11 of 19 5,271,197
ENERGY CONCENTRATION STORY N A
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2
I F
ENERGY CONCENTRATION STORY
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YIELD STRENGTH AI
FIG/4
US. Patent Dec. 21, 1993 Sheet 12 of 19 5,271,197
YIELD STRENGTH OF ELASTIC DEFORMATION MENBERS AND PLASTIC DEFORMATION MEMBERS
N 1
YIELD STRENGTH 0F STORY
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YIELD STRENGTH AI
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DISPLACEMENT OF STORY
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